The Time and Frequency Standards Laboratory is a part of the
National Physical Laboratory in
New Delhi
New Delhi (, , ''Naī Dillī'') is the capital of India and a part of the National Capital Territory of Delhi (NCT). New Delhi is the seat of all three branches of the government of India, hosting the Rashtrapati Bhavan, Parliament Ho ...
which maintains and calibrates the
Indian Standard Time
Indian Standard Time (IST), sometimes also called India Standard Time, is the time zone observed throughout India, with a time offset of UTC+05:30. India does not observe daylight saving time or other seasonal adjustments. In military and avi ...
.
Features of the Time and Frequency Standards Lab include:
* Four
caesium and
rubidium atomic clocks
* HF broadcast service operating at 10 MHz under call sign ''ATA'' to synchronise the user clock within a millisecond. This service has been discontinued as of today.
* An innovative time service via telephone line known as ''Teleclock'' service was launched on 28 July 2009. After successful commissioning this type of service in Nepal and Saudi Arabia, initiation of similar service in SAARC countries are being planned.
[ ]
*
INSAT
The Indian National Satellite System or INSAT, is a series of multipurpose geostationary satellites launched by ISRO to satisfy the telecommunications, broadcasting, meteorology, and search and rescue operations. Commissioned in 1983, INSAT i ...
satellite-based standard time and frequency broadcast service which offers IST correct to ±10 microsecond and frequency calibration up to ±10-10.
* Time and frequency calibrations are made with the help of pico- and nano-seconds time interval, frequency counters, and phase recorders.
See also
*
Time and frequency metrology
Time metrology or time and frequency metrology is the application of metrology for time keeping, including frequency stability.
Its main tasks are the realization of the second as the SI unit of measurement for time and the establishment of time s ...
References
External links
Indian Time Today (IST)
{{DEFAULTSORT:Time And Frequency Standards Laboratory
Research institutes in Delhi
Time in India